System for selective scaling of digital video images
    1.
    发明授权
    System for selective scaling of digital video images 失效
    用于数字视频图像选择性缩放的系统

    公开(公告)号:US4872064A

    公开(公告)日:1989-10-03

    申请号:US110001

    申请日:1987-10-19

    IPC分类号: G06T3/40 H04N1/393

    CPC分类号: G06T3/4023 H04N1/3935

    摘要: Method and apparatus for the selective scaling, such as magnification and reduction, of video images stored as collections of image pels in a video memory. A lookup table is provided for determination of the values of the scaled image pels. A framing matrix of unscaled image pels is established for each scaled image pel. The framing matrix for the scaled image pels determines the outputs read out of the lookup table, and derivatively, determines the values of the scaled image pels. The scaled image pels are stored in the video memory for subsequent display or processing.

    摘要翻译: 用于在视频存储器中存储为图像像素集合的视频图像的选择性缩放(例如放大和缩小)的方法和装置。 提供查找表以确定缩放图像像素的值。 对于每个缩放图像像素,建立非缩放图像像素的成帧矩阵。 用于缩放图像像素的成帧矩阵确定从查找表读出的输出,并且导数确定缩放图像像素的值。 缩放的图像像素存储在视频存储器中用于随后的显示或处理。